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Increased Understanding of Building Operational Performance Through Occupant-Centric Key Performance Indicators
Get PDFThis article introduces a novel framework for Occupant-Centric Key Performance Indicators (OC KPIs) which aims to increase the understanding of building performance by aligning with occupant presence during the operational phase. Unlike traditional Key Performance Indicators (KPIs), OC KPIs can better emphasize the usefulness of energy use in the building to provide services and indoor comfort to occupants when they are actually present. Within this framework, the study explores 52 traditional KPIs and OC KPIs focusing on heating use, electricity use, domestic hot and cold water use, thermal comfort, and air quality. The study case is a multi-story residential low-energy building located in Denmark (five apartments, 16 rooms). The findings suggest that incorporating occupancy data in the OC KPI calculations enables a deeper understanding of energy-related occupant behavior and Indoor Environmental Quality (IEQ). These include 1) the potential for installing a more advanced heating control algorithm by analyzing occupancy over time in relation to heating use, and 2) the identification of significant appliance-related behavior in correspondence with load matching, which can be used for predictive maintenance or personalized energy use feedback. Furthermore, OC KPIs show the potential to help detect insufficient IEQ, energy use inefficiencies due to system anomalies/faults and/or occupant behavior, and guide towards savings opportunities. Finally, this article discusses the practical implementation of OC KPIs, and compares the latter with traditional KPIs, thus supporting a paradigm shift towards a more occupant-centric assessment of building performance.publishedVersio
Spread of invasive species via biofouling of marine vessels: A brief assessment
Get PDFRecently the IMO Marine Environmental Pollution Committee (MEPC) adopted Resolution MEPC.378(80) with the aim to establish guidelines that can minimize the transfer of marine invasive species through biofouling of ships. The primary objectives of this brief study included i) to assess and identifying the key marine invasive species whose global spread has been documented to occur via fouling of maritime vessels; ii) to assess and summarising the impacts related to the spread of marine invasive species; and iii) to assess whether the measures set out in MEPC.378(80) can be effective in preventing the further spread of marine invasive species if the Guidelines are made binding. The study indicated that the measures in the MEPC Guidelines have a strong potential for preventing the further global spread of marine invasive species by maritime vessel movements. However, adherence to the Guidelines is presently voluntary, and this potential is unlikely to be reached without some level of regulation implemented by a meaningful proportion of maritime nations and marine environments.Spread of invasive species via biofouling of marine vessels: A brief assessmentNorwegian Ministry of Climate and EnvironmentpublishedVersio
Exploring new solid electrolyte support matrix materials for molten carbonate fuel cells (MCFCs)
Get PDFNew oxide ion conductors with perovskite structures containing alkali metal were explored for use as solid support materials for MCFCs (molten carbonate fuel cells). The conductivity of two candidates, BNT (0.94Bi0.5Na0.5TiO3-0.06BaTiO3) and LNT (La0.5Na0.5TiO3), in an oxidation atmosphere, were measured and compared. The conductivity measurement of BNT in a reducing atmosphere indicated the reduction of BNT to Bi metal by a sharp change in conductivity. It limited the lifetime of the fuel cell using BNT as solid support. Fuel cell measurements using the alternative perovskite LNT showed excellent stability under fuel cell operation conditions and high-power density compared to conventional MCFC with LiAlO2 as the solid matrix. The reason for obtaining high electrochemical performance using the LNT matrix is discussed.publishedVersio
Spørsmål til Barnehage-Norge 2024
Get PDFSpørsmål til Barnehage-Norge 2024 presenterer resultatene fra den årlige spørreundersøkelsen fra Utdanningsdirektoratet til barnehagesektoren i Norge. Temaene i årets undersøkelse er: barnehagetilbud til fordrevne ukrainske barn, kompetanseutvikling om spesialpedagogikk og inkluderende praksis, barnehagemagasinet Vetuva, beredskap og samfunnssikkerhet, rekruttering og dessuten videreutdanning.Spørsmål til Barnehage-Norge 2024ISBN: 978-82-14-07410-0publishedVersio
FoU-prosjekt – Kildestøy fra veitrafikk. Etablering av oppdaterte kildemodeller for Norge ved hjelp av målekampanje og KI
Get PDFI samarbeid med Statens vegvesen, har SINTEF gjennomført et forsknings- og
utviklingsprosjekt med mål om å vurdere dagens gjeldende kildemodeller for
veitrafikkstøy for norske forhold, mer spesifikt Cnossos-EU og Nord2000. Hovedfunnet i
prosjektet er at eksisterende kildemodeller ikke er representative for dagens norske
forhold, og at de i sin nåværende form hverken gjengir riktig spekter, nivå eller
hastighetsavhengighet for norsk bilpark på de norske veidekkene som har blitt undersøkt
her.
ISBN: 978-82-14-07056-9publishedVersio
Omfanget av identifisert, men ikke utført korrigerende vedlikehold. Sammenhenger med hendelser og ansattes opplevelser av vedlikehold
Get PDFDenne studien undersøker omfanget av og trend i det totale korrigerende vedlikeholdet (KV) som er identifisert, men ikke er utført («KV totalt»), og sammenhengen dette har med rapporterte hendelser og spørreskjemadata i RNNP, i perioden 2015–2023. Rapporten inneholder detaljerte resultater av vurderinger og analyser, i tillegg til overordnede konklusjoner og anbefalinger til næringen. Arbeidet er avgrenset til permanent plasserte innretninger offshore og landanlegg. Studie finansiert av Havindustritilsynet som en dybdestudie i RNNP-prosjektet. Utførende har vært SINTEF AS og Safetec Nordic AS.Omfanget av identifisert, men ikke utført korrigerende vedlikehold. Sammenhenger med hendelser og ansattes opplevelser av vedlikeholdpublishedVersio
Incorporating Objective Weights in the Risk Assessment of Wave Energy Converters
Get PDFIt is necessary to minimize operational risks prior to a wave energy converter (WEC) being introduced to the market. Failure modes and their underlying causes can be identified by a failure analysis, typically with the aim of implementing remedial actions to address problems and lower the likelihood of future failures and costs. This study identifies failures and targets actions by conducting a failure mode, effects and criticality analysis (FMECA) on a generic WEC. It proposes a method of including objective weighting to the severity of components’ failure consequences in the FMECA for a case study in the West of Ireland. © 2024 by the International Society of Offshore and Polar Engineers (ISOPE).Incorporating Objective Weights in the Risk Assessment of Wave Energy ConvertersacceptedVersio
Kunnskapsoppdatering om utvikling i posisjoneringsteknologi og virkninger på bruksområder av mobildata
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